Small static-pressure-resisting hydrophone for drag-wire array

Abstract

The present invention relates to a hydroacoustic transducer belonging to sonar and offshore geophysical prospecting field. It contains casing, seal entrant sound glue, upper end cover, bottom end cover, intermediate support ring, and piezoelectric ceramics component, wherein said piezoelectric ceramics component including electrode sectional radial polarization piezoelectric ceramics circular pipe having same capacitance, said two ceramics circular pipes coaxial arrangement, fit on intermediate support ring according to electrode series connected mode, bottom end cover respectively fit on twoceramics circular pipe upper and lower ends, two electrode columns firmly fit on upper end cover, said intermediate support ring, upper end cover and bottom end cover all adhesive joining with ceramics circular pipe to form one integral enclosed construction. Said invention has advantages of controllable working band width, receiving voltage sensitivity and static pressure proof ability, stable and reliable performance.

Description

technical field [0001] The invention belongs to the field of sonar and marine geophysical exploration, in particular, the invention relates to an underwater acoustic transducer. Background technique [0002] Due to its low and wide operating frequency band (several Hz to several thousand Hz), large working aperture (hundred meters to thousands of meters) and flexible and convenient retractable methods, the towed line array is widely used in remote detection of sonar and marine geophysics. important role in exploration. The towed line array elements (primitives) that make up the towed line array - the hydrophone is the key device to realize the towed line array, its size, performance and anti-static pressure ability are very important for realizing the excellent combat technology of long-range detection sonar Indicators and improved marine geophysical exploration capabilities are critical. [0003] At present, the array elements used in towed sonar and marine geophysical ex...

AI Technical Summary

Problems solved by technology

The advantage of this kind of array element is that it is small in size and easy to realize miniaturization, with high receiving sensitivity and certain bandwidth. The fatal weakness is its poor resistance to hydrostatic pressure, and it is only suitable for use in shallow seas within 50 meters.

[0004] The circular ring array element (Patent, U.S., 4205954, 1980, 5) is a towed linear array element developed on the basis of the commonly used circular ring hydrophone. It has a certain receiving sensitivity and a wide working bandwidth , especially it has a good ability to resist static pressure, but the size of the annular array element is relatively large (the towed line array formed is relatively thick), and the high impedance brings certain difficulties to transmission matching. Currently, large-scale Adopted in surface ship towed sonar

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